MSVC: use WNT native Schannel SSL/TLS implementation

--- curl/lib/Makefile.vc10.old	2013-11-19 00:00:29.044499752 +0100
+++ curl/lib/Makefile.vc10	2013-11-19 00:01:29.135499684 +0100
@@ -260,7 +260,7 @@
 TARGET = $(LIBCURL_DYN_LIB_REL)
 DIROBJ = $(CFG)
 LNK    = $(LNKDLL) $(WINLIBS) /out:$(DIROBJ)\$(TARGET) /IMPLIB:$(DIROBJ)\$(LIBCURL_IMP_LIB_REL)
-CC     = $(CCNODBG) $(RTLIB)
+CC     = $(CCNODBG) $(RTLIB) $(CFLAGSWINSSL)
 CFGSET = TRUE
 RESOURCE = $(DIROBJ)\libcurl.res
 !ENDIF
@@ -427,7 +427,7 @@
 TARGET = $(LIBCURL_DYN_LIB_DBG)
 DIROBJ = $(CFG)
 LNK    = $(LNKDLL) $(WINLIBS) /DEBUG /out:$(DIROBJ)\$(TARGET) /IMPLIB:$(DIROBJ)\$(LIBCURL_IMP_LIB_DBG) /PDB:$(DIROBJ)\$(LIBCURL_DYN_LIB_PDB)
-CC     = $(CCDEBUG) $(RTLIBD)
+CC     = $(CCDEBUG) $(RTLIBD) $(CFLAGSWINSSL)
 CFGSET = TRUE
 RESOURCE = $(DIROBJ)\libcurl.res
 !ENDIF